Vacuum furnaces are an indispensable piece of equipment in modern industry. It can implement complex processes that cannot be handled by other heat treatment equipment, namely vacuum quenching and tempering, vacuum annealing, vacuum solid solution and time, vacuum sintering, vacuum chemical heat treatment and vacuum coating processes. Its furnace temperature can reach up to 3000 ℃, and tungsten and molybdenum have good high temperature resistance and low thermal expansion coefficient, so they are often used as some accessories in the furnace.
Generally, when the furnace temperature is higher than 1100 degrees Celsius, molybdenum or tungsten will be regarded as a heat shield (including side baffles and upper and lower cover screens): as the heat insulation parts in the furnace, the key role of the molybdenum tungsten reflector screen and the upper and lower covers The plate is to block and reverberate the heat in the furnace. The tungsten and molybdenum heat insulation plate is generally made of riveting, which can be butted or overlapped. Corrugated plates, U-shaped grid bars or molybdenum wire springs and spacers can be used between the screens of each layer, and are fixed with molybdenum wire or tungsten wire clips and screws.
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Products name |
Parameters |
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Purity |
Mo，W≥99.95% |
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Density |
Mo Material≥10.1g/cm3 or tungsten material≥19.1g/cm3 |
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Application temperature environment |
≤2800℃; |
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Plastic-brittle transition temperature |
W between 200-400℃ Mo is between 20-400 °C. |
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Vapor pressure |
W is about 10-6Pa at 2100°C, Mo is about 10-2Pa at 2100°C; |
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Anti-oxidation performance |
W is rapidly oxidized at higher than 500°C in air, and Mo is rapidly oxidized at higher than 400°C.The use environment of the tungsten heat shield or the molybdenum heat shield needs to be in a vacuum or inert atmosphere environment. |
Baoji Winners manufactures primarily tungsten and molybdenum and its alloy materials and can be customized to meet customer needs. For more product information, please contact us (Whatsapp: +86 156 1977 8518).
Post time: Aug-02-2022